Method for managing network when master disappears
First Claim
1. A method for building up backup master information, comprising the steps of:
- (a) receiving connection information from at least one of a plurality of slaves in a network, wherein the received connection information includes at least one of a received signal strength indication (RSSI) and link quality information, wherein the link quality information comprises an index of error rate in data transmission between a network master and each slave;
(b) determining a priority of said at least one of the plurality of slaves to be used as a backup master, when a network master disappears, according to at least one of the RSSI and the link quality information included in the received connection information; and
(c) announcing the determined priority to at least another one of the plurality of slaves prior to the network master disappearing.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for managing a network in which Bluetooth equipped devices are linked together when the network master cannot serve as a master. During normal operation, the network master updates the backup master rank information when the network master disappears, in a predetermined cycle, according to link information, such as received signal strength indication (RSSI) or link quality, transmitted from the Bluetooth equipped devices serving as a slave. When power of the network master is exhausted, or when the network master leaves the network operating region, a new master is selected from the remaining slaves according to the backup master rank information, thereby reconfiguring a network around the new network master. The method enables proper designation of a new master when a preexisting network master leaves the network operating region, thereby increasing a probability of holding connection throughout the network.
57 Citations
13 Claims
-
1. A method for building up backup master information, comprising the steps of:
-
(a) receiving connection information from at least one of a plurality of slaves in a network, wherein the received connection information includes at least one of a received signal strength indication (RSSI) and link quality information, wherein the link quality information comprises an index of error rate in data transmission between a network master and each slave; (b) determining a priority of said at least one of the plurality of slaves to be used as a backup master, when a network master disappears, according to at least one of the RSSI and the link quality information included in the received connection information; and (c) announcing the determined priority to at least another one of the plurality of slaves prior to the network master disappearing. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method for designating a new master of a network when a preexisting network master disappears, the method comprising the steps of:
-
(a) determining at a slave whether the preexisting network master has disappeared; (b) if the preexisting network master has disappeared, checking a rank assigned to the slave by the preexisting network master which determined the rank based on connection information received from the slave by the preexisting network master, wherein the rank is used for choosing a new network master and is received before the disappearance of the preexisting network master; and (c) changing the slave to the new network master if it is determined that the rank is highest of any one assigned to a plurality of slaves, wherein the connection information received from the slave by the preexisting network master includes at least one of received signal strength indication (RSSI) and link quality information, the link quality information comprises an index of error rate in data transmission between the preexisting network master and each slave, and the preexisting network master determines the rank based on at least one of the received signal strength indication (RSSI) and the link quality information. - View Dependent Claims (8, 9, 10, 11, 12)
-
-
13. A method for establishing a connection between a new master and a remaining plurality of slaves of a network when a preexisting network master disappears, the method comprising the steps of:
-
(a) checking whether the preexisting network master has disappeared; (b) checking backup master rank information which is assigned to the slave by the preexisting network master which determined the backup master rank information based on connection information received by the preexisting network master from the slave, when it is determined that the preexisting network master has disappeared in the step (a); (c) attempting to establish a connection with the new network master when it is determined that one of the remaining plurality of slaves does not have a highest priority, according to the backup master rank information; and (d) remaining as one of the remaining plurality of slaves if a connection with the new network master is established in the step (c), wherein the connection information received from the slave by the preexisting network master includes at least one of received signal strength indication (RSSI and link quality information, the link quality information comprises an index of error rate in data transmission between the preexisting network master and each slave, and the preexisting network master determines the backup master rank information based on at least one of the received signal strength indication (RSSI) and the link quality information.
-
Specification